Re: compile error about destructor

From:

Abhishek Padmanabh <abhishek.padmanabh@gmail.com>

Newsgroups:

microsoft.public.vc.language

Date:

Wed, 20 Feb 2008 06:52:40 -0800 (PST)

Message-ID:

<d98207f6-accc-43a1-8c46-e39809b4d838@k2g2000hse.googlegroups.com>

On Feb 20, 6:33 pm, George <Geo...@discussions.microsoft.com> wrote:

Hi Ben,

I have tried your code, and your code will cause application deadlock
symptom (after statement throw)? Hand-up? Here is the whole code,

The problem is with your incorrect usage of SEH as below:

int main()
{
__try{
helper();} __except (GetExceptionCode())

{
cout << "access violation caught 2" << endl;

}
return 0;
}

The __except handler is incorrect. There are only 3 valid values for
it. If the result of the expression for __except is anything other
than those 3 values probably it gets blocked searching for an
appropriate value (or whatever as per msdn, I am not sure what blocks
the execution) and hence the execution hangs up. You should rephrase
that as below:

__try
{
    helper();
}
__except (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION ?
                       EXCEPTION_EXECUTE_HANDLER :
EXCEPTION_CONTINUE_EXECUTION)
{
    cout << "access violation caught 2" << endl;
}

Note the use of "__finally" in Ben's response.